1258556442 has 64 divisors (see below), whose sum is σ = 3059199360. Its totient is φ = 339897600.

The previous prime is 1258556441. The next prime is 1258556449. The reversal of 1258556442 is 2446558521.

It is a junction number, because it is equal to n+sod(n) for n = 1258556394 and 1258556403.

It is not an unprimeable number, because it can be changed into a prime (1258556441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 409 + ... + 50172.

It is an arithmetic number, because the mean of its divisors is an integer number (47799990).

Almost surely, 2^1258556442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1258556442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1529599680).

1258556442 is an abundant number, since it is smaller than the sum of its proper divisors (1800642918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1258556442 is a wasteful number, since it uses less digits than its factorization.

1258556442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50639.

The product of its digits is 384000, while the sum is 42.

The square root of 1258556442 is about 35476.1390514808. The cubic root of 1258556442 is about 1079.6696640607.

The spelling of 1258556442 in words is "one billion, two hundred fifty-eight million, five hundred fifty-six thousand, four hundred forty-two".